Take a look at the chart. The variable is smack-dab in the middle, represented by a small circle. Notice that many of the nearby stars have numbers next to them &#151; those numbers are the apparent magnitudes, to the nearest tenth of a magnitude, of the indicated stars. The decimals points are removed to avoid confusing them for another star. For example, the star marked "59" at the top of the chart is magnitude 5.9.